161300031 has 8 divisors (see below), whose sum is σ = 215144880. Its totient is φ = 107494272.

The previous prime is 161300023. The next prime is 161300089. The reversal of 161300031 is 130003161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161300031 - 2³ = 161300023 is a prime.

It is a super-2 number, since 2×161300031² = 52035400001201922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161300011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1825 + ... + 18053.

It is an arithmetic number, because the mean of its divisors is an integer number (26893110).

Almost surely, 2^161300031 is an apocalyptic number.

161300031 is a deficient number, since it is larger than the sum of its proper divisors (53844849).

161300031 is a wasteful number, since it uses less digits than its factorization.

161300031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19545.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 161300031 is about 12700.3949151198. The cubic root of 161300031 is about 544.3499035235.

Adding to 161300031 its reverse (130003161), we get a palindrome (291303192).

The spelling of 161300031 in words is "one hundred sixty-one million, three hundred thousand, thirty-one".